\begin{tabular}{l c c c c c c c}
\hline

 & n & ga-ra & sd ga-ra & ra-memetic & sd ra-memetic & ga-memetic & sd ga-memetic\\
\hline
 & 5 & -0.126 & 0.217 & 0.164 & 0.203 & 0.038 & 0.118\\
 & 8 & -0.024 & 0.6 & 0.522 & 0.538 & 0.499 & 0.446\\
 & 20 & 0.201 & 1.266 & 2.425 & 1.236 & 2.626 & 1.023\\
\hline
small &  & 0.046 & 0.904 & 1.251 & 1.356 & 1.297 & 1.38\\
\hline
 & 30 & 1.486 & 1.682 & 3.894 & 1.404 & 5.38 & 1.032\\
 & 40 & 1.964 & 2.011 & 4.151 & 2.251 & 6.114 & 1.218\\
\hline
medium &  & 1.725 & 1.846 & 4.022 & 1.856 & 5.747 & 1.187\\
\hline
 & 60 & 5.198 & 2.306 & 7.081 & 2.232 & 12.279 & 2.41\\
 & 100 & 5.372 & 2.563 & 17.977 & 2.804 & 23.348 & 0.383\\
 & 150 & -3.746 & 2.03 & 29.287 & 2.049 & 25.541 & 0.131\\
\hline
large &  & 3.479 & 4.323 & 15.88 & 8.708 & 19.359 & 6.037\\
\hline
All &  & 1.548 & 3.027 & 6.549 & 8.16 & 8.096 & 8.601\\
\end{tabular}
